Cableizer ®

Distance conductor axis—cable axis

In two-core cables, $c_c=s_c/2$ and in three-core cables, $c_c=s_c/\sqrt 3$.

Symbol
$c_{c}$
Unit
mm
Formulas
$0.55r_{1}+0.29{\cdot}2t_{i}$multi-core cables, sector-shaped conductors
$\frac{s_{c}}{2sin\left(\frac{\pi}{n_{c}}\right)}$multi-core cables, round conductors
$\frac{s_{c}}{2}$two-core cables, round conductors
$\frac{s_{c}}{\sqrt{3}}$three-core cables, round conductors
$\frac{D_{f}-s_{c}}{2}$three-core cables, round conductors, CIGRE TB 880 Guidance Point 33
Related
$D_{f}$
Diameter over filler [mm]
$n_{c}$
Number of conductors cable
$\pi$
Archimedes' constant $\pi$
$r_{1}$
Construction circle circumscribing the shaped conductors [mm]
$s_{c}$
Separation of conductors in a system [mm]
$t_{i}$
Thickness insulation [mm]
Used in
$\alpha_{p}$
Factor $\alpha_p$
$C_{b}$
Capacitance insulation [F/m]
$C_{E}$
Capacitance to earth [F/m]
$\lambda_{12}$
Loss factor shield, eddy currents
$\lambda_{2}$
Loss factor armour
$\lambda_{21}$
Loss factor armour, circulating currents
$q_{Mie}$
Factor $q$ (Mie1905)